Alloy



Patented Nov. 10, 1 925- UNITED STATE ATENT" OFFICE.

I 13mm 1;. pass, on nusimoon, mcnmn'nj ALLOY.

Io Drawing.

TOaZZ-whom itfmay concern:

Be it known .that I, MELVIN PAGE,

.a citizen of the United States, residing at loy having certain improved -characteris-' tics hereinafter appearing, and made by casting the molten component metals thereof in a mold. i Hitherto most of the metals used for denture bases have been either aluminum or gold alloys. Such gold alloys are expensive, heavy, difiicult to cast on account of the shrinking of the metal or of the mold in cooling, and require a very high temperature in casting, inasmuch as this metal cools rapidly and fails to run freely into the mold; -Y

Aluminum is not malleable and denture plates made thereof are necessarily thick to compensate for lack of strength, are porous and thus collect impurities rendering their use unsanitary. '30 Various other alloys, not in general use,

are subject to decomposing electrolytic action and certain chemical reactions. d

To obviate the above difliculties, I have provided an alloy composed'of aluminum,

pose to con Application filed April 22, 1 925 Serial No. 25,128.

goldand co pm; and while I do notpro 3 p e myself, in carrying out the present invention, to an alloy composed of said metals inthe exact proportions here-- inafter mentioned, I have found that said .metals may be mixed and melted preferably 40 in substantially the following proportions V in weight Aluminum, ,9320 .per cent; gold, 4.55 per. cent; copper, 2.25 percent.

The casting temperature of this alloy is 46 comparatively low and the" cast exhibits onl a neg'liable amount of shrinkage in coo ing, so-that a properly fitting denture base may be readily made thereof; and this alloy although of light weight has sutficicnt strength, is non-porous, is malleable, comparatively inexpensive, white, lustrous, takes a high polish,-does not discolor, and is not subject to decomposing electrolytic action or other chemical reaction, and is thus non corrosive/ I claim: a

1. .An alloy composed of the following metals in substantially the following pro-' portions: aluminum 93.20 per cent; gold 00 4.55 per cent; copper 2.25 per cent. v

2. An alloy composed of aluminum in largely predominant ambunt,"and copper and gold each in substantial amounts.

' In testimon '-whereof'I havehereunto set 6 7 my hand atv rand Rapids, Michigan, this i 147th day of April, 1925.

MELVIN E. PAGE. 

